Open-hearth furnace



June 1s, 1946..

E. R. DRZEWIECKI OPEN HEARTH FURNACE Filed Dec. 7, 1942 I 5 sheets-sheet 1 I nventor Edward Ezawz'eckv' By Qwaozu M/wey Hmm E. R. DRzEwlEcKl Y* 2,402,152

OPEN HEARTH FURNAGE Filed neo. '-7, 1942` 5 sheets-Shasta Inventor WWW JUN 18,' E. RQ DRzwxEcKl v v `2,402,152

OPEN HEART'H FURNACE Filed Dec. 7, 1942 5 Sheets-Sheet 3 Inventor June 18, 1945. E. R. DRzr-:WIECK:l u 2,402,152 l.

OPEN HEARTH FURNACE Filed Deo. '7, 1942 5 Sheets-Sheet 4 l 5mm mmmecf June' 18, 1946. E R, vD RZEWIECKl 2,402,152

OPEN HEARTH FURNAGE Filed Deo. 7, 1942 5 Sheets-Sheet 5 o Inventor ga www 752 ,Ffzezazc Y mfg/dwg 19mm' Patented June 18, 1946I uNlTED sTATEsPATENT OFFICE 2,402,152 OPEN-llanura FURNACE i Edward R. Drxewiecki, Chicago, lll.

Application December 7, 1942, serial No. 468,135

Aembodying water cooling means for the door, as ,well as water cooled guides for the ends of the door and cooling tanks in the furnace structure behind the upper portion of the door.

A further important object is to provide novel brace means for the front and top of the furnace and also to provide reinforcing means vat the lower part of the furnace with which the charging cars come into contact to prevent injury to that part of the furnace.

A still further object is to provide an apparatus oi' this character of simple and practical construction, which is efficient and reliable in performdinally inclined channels 9 and I0, respectively. connected thereto.

Embedded in the foundation Il are the vertical buckstays I2 on the upper ends of which the main' front beam 1 is supported.

'I'he charging opening at the front oi the furnace includes a sill plate I3 resting on the castings M which are supported by the short vertical buckstays l5. At each endof the opening are the end cooling chambers I6 extending vertically at each side of the charging opening,

Positioned in the opening are a plurality of doors I'Lvl, i9 and 20, the doors being oi.' hollow construction and formed at their rear faces with a recess 2| within which is placed iirebrick 22. Adjacent one upper corner of each door is an intake port 23 and adjacent an opposite upper corance, relatively inexpensive to manufacture and otherwise well adapted for the purposes for which the same is intended.

Other objects and advantages reside in the details of construction and operation as more fully hereinafter described and claimed, reference be- A ing had to the accompanying drawings forming part hereof, wherein like numerals refer to like parts throughout and in which:

Figure 1 is a front elevational view.

Figure 2 is a perspective view showing the iront of one of the doors.

Figure 3 is a similar view showing the rear oi the door.

Figure 'i is a longitudinal horizontal sectional view looking into the bath of the furnace.

Figure 5 is a similar view looking upwardly toward the top of the furnace.

Figure 6 is a fragmentary View in elevation of the inner side of the front of the furnace.

Figure 'l is a transverse vertical sectional view oi the furnace.

Figure 8 is an enlarged vertical sectional View through the front of the furnace, and

Figure 9 is an enlarged rear elevational view of the front of the furnace.

Referring now to the drawingsvin detail the numeral E5 designates the roof arch generally which includes the roof cross beams 6 resting on the main front beam 'I and the longitudinal reinforcing channel 3 and laterally and longitudit ner is a discharge Dort 24, each port having a hose 25 attached thereto leading to a suitable supply of water for circulating cooling water through the door.

The adjacent edges of the doors are formed with intertting ribs and grooves 26 and 23 adapted to substantially seal the edges of the doors. l

The lower edges of the doors are beveled as shown at 21 to insure a tight fit with the sill plate i3..

At the vertical side edge of each door arc cooperating notches 28 serving the purpose of test holes. Each dooris provided with a plurality of rivets 29 passing through the water area therein to reinforce the front and rear walls of the door should the water become overheated and turn to steam,

The doors are raised and lowered by means of individual cables 30 extending upwardly from the door and over pulleys 3| carried by the main front beam 7. The chain or cable 30 leads to a suitable hoisting mechanism (not shown).

Recessed in the front edge of the short buckstays i5 are a plurality of horizontally extending bumper bars 32 protecting the lower part of the furnace from the constant bumping of the charging car. Directly behind the main buckstays i2 and extending upwardly t0 the main beam are the main arch roof supports 33. These supports reinforce the roof and the roof channel at the front of the furnace. This construction eliminates the necessity of individual castings and door guides.

Behind the front of the furnace above the doors are a plurality of water tanks 34 to cool the main arch roof supports 33.

rThe ilrebrick 35 above the charging opening is ascenso iirebrick by the charging car.

The upper bucks'tays 36 are provided on their' inner faces with spaced anges 3B to which the ends of gusset braces 39 are secured by bolts du, the braces 3g extending upwardly to the roof structure.

Similar gusset braces il are provided at the rear top portion ofthe furnace and the lower iront portion of the furnace is-provided with similar gusset braces d2. The gusset braces- Q2 serve as a foundation for the chrome brick i3 extending throughout the entire furnace floor.

Extending across the front of 'the furnace immediately above the charging opening is the main roof channel Mi held in place by the rods E55 and the main rooi channel supports the rebricir it forming the arched top oi the furnace as well as the iirebrick 35.

The construction thus provided permits a limited flexibility of the roof to allow the same to breathe due to extreme variations in temperai tures to which the furnace is subjected.

above and below the opening, an arched ro )i extending from th'e front buck stays at a point immediately above the charging opening to the rear section, a vertically movable door for the opening, a reinforcing open freine structure connecting the front and rear sections above the roof, andY means carried by theframe structure for raising and lowering the door.

2. A furnace of the class described including front and rear walls said front Wall having a charging opening extending throughout the greater portion of tne Width o the Wall, buck Istays for thel front wall above and below the opening, vertically movable doors for the opening having interiitting edges, an arched roof extending from the buck stays oi' the front Wall to the rear wall, re brick forming frame for the tcp of the opening and supporting the iront edge of the roof, a channel beam extending along the top of the opening and having its edges ernbedded respectively in the front Wall above the opening and in the iire brick rame to anchor the frame to the front wall and a reinforcing structurc for the walls above the roof and including horizontal transverse beams connecting the front and rear walls and gusset braces extending from he buck stays above the opening to the horizontal earns.

EDWARD R. DRZEWIECEI. 

